QVariant::ConstReference Class
template <typename Referred> class QVariant::ConstReferenceThe QVariant::ConstReference acts as a const reference to a QVariant. More...
This class was introduced in Qt 6.11.
Public Functions
| ConstReference(Referred &&referred) | |
| ConstReference(const Referred &referred) | |
| QVariant | operator QVariant() const |
Detailed Description
As the generic iterators don't actually instantiate a QVariant on each step, they cannot return a reference to one from operator*(). QVariant::ConstReference provides the same functionality as an actual reference to a QVariant would, but is backed a referred-to value given as template parameter. The template is implemented for QMetaSequence::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.
Member Function Documentation
[explicit noexcept(...)] ConstReference::ConstReference(Referred &&referred)
Creates a QVariant::ConstReference from a referred.
Note: This function is noexcept when std::is_nothrow_move_constructible_v<Referred> is true.
[explicit noexcept(...)] ConstReference::ConstReference(const Referred &referred)
Creates a QVariant::ConstReference from a referred.
Note: This function is noexcept when std::is_nothrow_copy_constructible_v<Referred> is true.
[noexcept(...)] QVariant ConstReference::operator QVariant() const
Dereferences the reference to a QVariant. This method needs to be specialized for each Referred type. It is pre-defined for QMetaSequence::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.
Note: This function is noexcept when Referred::canNoexceptConvertToQVariant is true.
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